from 0.3Hz with lower output level, high distortion above 10kHz. All this with one filter.
Cascaded configuration makes distorted sine

Output level (at high Q):

10Vpp around center GND

Temperature drift:

it's not stabilized, so it should be as SSM2164 data sheet specify (havent measured this) which is about 0.5%/C

Center frequency:

500Hz at no CV applied (Tune in the middle)

Power Supply:

+/-12V at 30mA

Construction

The panel is made of 3.5mm thick aluminium plate powder painted to "computer-grey" color. All pots, switches and jacks are attached to it. This way pots had to go through shaft-cutting operation. Panel writings are made in PCB software and transfered to the plate in small print house.
The PCB houses all circuitry and pots, so the wires go only to jacks and unfortunately to the switches, because I don't know any switch to fit my idea of making modules. Along with isolating plate the PCB is attached to panel only by pot's and switches' nuts. A lot of less work than with quad vco and dual ADDSR.
It's single width (12TE or 2.4''), fits into 5U 19''rack frame.